New improved Head flow has offered even more power for the same money!!!!!

GO FROM 70 TO OVER 130* REAR WHEEL HORSEPOWER

The 107” upgrades offered by Star Racing delivers more bang for your buck than any other upgrade on the market. Our performance packages typically produce 130+ horsepower depending upon your current *exhaust system. Installation of the kit maintains the appearance of a stock engine, but you will definitely feel the difference! Finally, your bike will be the fastest and your buddies will be scratching their heads trying to figure out what you have done. One work week turnaround (dependent upon throttle body replacement). *When used with D&D Boarzilla exhaust.

This motorcycle came to us with only 90 horsepower, and we added 50 more!Now it’s WAY more fun to ride!

We bored it to 113 cubic inches at 10 to 1 compression ratio. We installed our custom pistons, custom ground cams with oversize valves, and ported the heads to add 50 more rear wheel horsepower! Not just a "port and polish" job! But, a big change in shape and size to flow enough air to make 140 HP. We finished with just over 140 RWHP and just over 140 ft. lbs. of torque!

Please call Star Racing for more info on this 113” Thrasher Kit!
This is the way Harley should sell them!

Call 800-841-7827 to make an appointment.

We Gained 50 Horsepower with this 113" kit!

Included in the package:

Cylinder Heads - Pro Ported & Machined

Cylinders - Bored & Honed With Torque Plates

Oversized Valves - Intake & Exhaust

Performance Valve Spring Kit

Titanium Retainers

113 CVO twin cam CP piston kit

SE Pro high flow injector kit

Custom ground cam kit

Camshaft installation kit

S&S adjustable Pushrod kit

MLS Head Gaskets

FBW 58 mm throttle body

Manifold modified to flow

S/E clutch upgrade

All Necessary Hardware

Fluids, Filter & Plugs

Complete Labor

Before & After Dyno Test

Custom Dyno Map

Other OptionsAvailable, TTS master tuner, Boarzilla exhaust and High flow air filter

Turn-Key Package Price: $5,275.00

Turn around time is typically 3 week depending on shop workload, so you will be back on the road in no time!

Customer Jobs:

Twin Cam 98" Harley Thrasher Kit

For 1999-2006 Harley-Davidson Models

A stock twin cam Harley has around 64 horsepower and about 75 foot pounds of torque. The Star Racing Thrasher Kit increases the horsepower on average to 118+ and the torque to 100 foot pounds. Turn around time is typically 3 week depending on shop workload, so you will be back on the road in no time!

Since 1980, Star Racing has been dedicated to providing its customers with the best in motorcycle performance and reliability and is pleased to announce the availability of the Thrasher Kit for your 1999 to 2006 twin cam Harley®. This kit is a Star exclusive that increases the performance of your motorcycle while maintaining the stock appearance and reliability.

The Star Racing Thrasher Kit has been designed to work with the stock clutches, starters, and all other Harley Davidson parts while maintaining ease of drivability and running on today’s pump gas.

Before and after dyno runs are performed on each bike so you may monitor the progress in performance. This means you not only feel the power, you can see it too!

Included in the package:

Heads - Pro Ported & Machined

Oversized Valves - Intake & Exhaust

Custom Cams

CP forged Pistons

Cylinders – Bored & Honed

Cam Bearings

58mm Throttle Body

Adjustable Push Rods

All Necessary Hardware & Fluids

Complete Labor

Before & After Dyno Test

Options include TTS tuner, Boarzilla exhaust and bigger and better air cleaners